The right to practice religion, or no religion at all, is among the most fundamental of the freedoms guaranteed by the Bill of Rights. It is sometimes wrongly imagined that the ACLU does not vigorously protect rights of freedom to exercise religion, particularly of Christians. In fact, the ACLU defends both the right against governmental establishment of religion and the right to freely practice one’s religion without governmental interference. These rights operate hand in hand, and together ensure that freedom of belief (and non-belief) can flourish.